spring ParserContext 源码
spring ParserContext 代码
文件路径：/spring-expression/src/main/java/org/springframework/expression/ParserContext.java
/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.expression;
/**
* Input provided to an expression parser that can influence an expression
* parsing/compilation routine.
*
* @author Keith Donald
* @author Andy Clement
* @since 3.0
*/
public interface ParserContext {
/**
* Whether the expression being parsed is a template. A template expression
* consists of literal text that can be mixed with evaluatable blocks. Some examples:
* <pre class="code">
* Some literal text
* Hello #{name.firstName}!
* #{3 + 4}
* </pre>
* @return true if the expression is a template, false otherwise
*/
boolean isTemplate();
/**
* For template expressions, returns the prefix that identifies the start of an
* expression block within a string. For example: "${"
* @return the prefix that identifies the start of an expression
*/
String getExpressionPrefix();
/**
* For template expressions, return the prefix that identifies the end of an
* expression block within a string. For example: "}"
* @return the suffix that identifies the end of an expression
*/
String getExpressionSuffix();
/**
* The default ParserContext implementation that enables template expression
* parsing mode. The expression prefix is "#{" and the expression suffix is "}".
* @see #isTemplate()
*/
ParserContext TEMPLATE_EXPRESSION = new ParserContext() {
@Override
public boolean isTemplate() {
return true;
}
@Override
public String getExpressionPrefix() {
return "#{";
}
@Override
public String getExpressionSuffix() {
return "}";
}
};
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦